diff --git a/AsbCloudApp/Repositories/IWellOperationRepository.cs b/AsbCloudApp/Repositories/IWellOperationRepository.cs
index 43a7a568..8cb313ac 100644
--- a/AsbCloudApp/Repositories/IWellOperationRepository.cs
+++ b/AsbCloudApp/Repositories/IWellOperationRepository.cs
@@ -129,6 +129,6 @@ namespace AsbCloudApp.Repositories
         /// <param name="wellOperations"></param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
-        IEnumerable<ValidationResult> ValidateWithDbAsync(IEnumerable<WellOperationDto> wellOperations, CancellationToken cancellationToken);
+        Task<IEnumerable<ValidationResult>> ValidateWithDbAsync(IEnumerable<WellOperationDto> wellOperations, CancellationToken cancellationToken);
     }
 }
\ No newline at end of file
diff --git a/AsbCloudInfrastructure/Repository/WellOperationRepository.cs b/AsbCloudInfrastructure/Repository/WellOperationRepository.cs
index 2e4e956a..208e94ac 100644
--- a/AsbCloudInfrastructure/Repository/WellOperationRepository.cs
+++ b/AsbCloudInfrastructure/Repository/WellOperationRepository.cs
@@ -334,12 +334,13 @@ public class WellOperationRepository : IWellOperationRepository
         return dtos;
     }
 
-    public IEnumerable<ValidationResult> ValidateWithDbAsync(IEnumerable<WellOperationDto> wellOperationDtos, CancellationToken token)
+    public async Task<IEnumerable<ValidationResult>> ValidateWithDbAsync(IEnumerable<WellOperationDto> wellOperationDtos, CancellationToken token)
     {
         var firstOperation = wellOperationDtos
             .FirstOrDefault();
+
         if (firstOperation is null)
-            yield break;
+            return Enumerable.Empty<ValidationResult>();
 
         var request = new WellOperationRequest()
         {
@@ -347,48 +348,49 @@ public class WellOperationRepository : IWellOperationRepository
             OperationType = firstOperation.IdType,
         };
 
-        var entities = BuildQuery(request)
+        var entities = await BuildQuery(request)
             .AsNoTracking()
-            .ToArray();
+            .ToArrayAsync(token);
 
         var wellOperationsUnion = entities.Union(wellOperationDtos).OrderBy(o => o.DateStart);
 
         var results = Validate(wellOperationsUnion);
-        foreach ( var result in results)
-            yield return result;
+        return results;
     }
 
     public IEnumerable<ValidationResult> Validate(IEnumerable<WellOperationDto> wellOperationDtos)
     {
-        var firstOperation = wellOperationDtos
-            .FirstOrDefault();
-        if (firstOperation is null)
+        var enumerator = wellOperationDtos.OrderBy(o => o.DateStart)
+            .GetEnumerator();
+        
+        if (!enumerator.MoveNext())
             yield break;
 
-        var wellOperations = wellOperationDtos.OrderBy(o => o.DateStart).ToArray();
-        for (var i = 1; i < wellOperations.Length; i++)
+        var previous = enumerator.Current;
+
+        while(enumerator.MoveNext())
         {
-            var prevOperation = wellOperations[i - 1];
-            var currentOperation = wellOperations[i];
+            var current = enumerator.Current;
+            var previousDateStart = previous.DateStart.ToUniversalTime();
+            var currentDateStart = current.DateStart.ToUniversalTime();
 
-            var prevOperationDateStart = prevOperation.DateStart.ToUniversalTime();
-            var currentOperationDateStart = currentOperation.DateStart.ToUniversalTime();
+            var previousDateEnd = previous.DateStart.AddHours(previous.DurationHours).ToUniversalTime();
 
-            var prevOperationDateEnd = prevOperation.DateStart.AddHours(prevOperation.DurationHours).ToUniversalTime();
-
-            if (prevOperationDateStart.AddDays(Gap) < currentOperationDateStart)
+            if (previousDateStart.AddDays(Gap) < currentDateStart)
             {
                 yield return new ValidationResult(
-                       $"Разница дат между операциями не должна превышать 90 дней",
-                       new[] { nameof(wellOperations) });
+                       "Разница дат между операциями не должна превышать 90 дней",
+                       new[] { nameof(wellOperationDtos) });
             }
 
-            if (prevOperationDateEnd > currentOperationDateStart)
+            if (previousDateEnd > currentDateStart)
             {
                 yield return new ValidationResult(
-                      $"Предыдущая операция не завершена",
-                      new[] { nameof(wellOperations) });
+                      "Предыдущая операция не завершена",
+                      new[] { nameof(wellOperationDtos) });
             }
+
+            previous = current;
         }
     }
 
diff --git a/AsbCloudWebApi/Controllers/WellOperationController.cs b/AsbCloudWebApi/Controllers/WellOperationController.cs
index 5c0039cc..79c7d900 100644
--- a/AsbCloudWebApi/Controllers/WellOperationController.cs
+++ b/AsbCloudWebApi/Controllers/WellOperationController.cs
@@ -237,9 +237,9 @@ namespace AsbCloudWebApi.Controllers
             wellOperation.IdUser = User.GetUserId();
             wellOperation.IdType = idType;
 
-            var validationResult = operationRepository.ValidateWithDbAsync(new[] { wellOperation }, cancellationToken);
+            var validationResult = awaitoperationRepository.ValidateWithDbAsync(new[] { wellOperation }, cancellationToken);
             if(validationResult.Any())
-                return this.ValidationBadRequest(nameof(wellOperation), "The date difference between the operations is more than 3 months");
+                return this.ValidationBadRequest(validationResult);
 
             var result = await operationRepository.InsertRangeAsync(new[] { wellOperation }, cancellationToken);
 
@@ -294,7 +294,7 @@ namespace AsbCloudWebApi.Controllers
 
             var validationResult = Validate(wellOperations, deleteBeforeInsert, cancellationToken);
             if (validationResult.Any())
-                return this.ValidationBadRequest(nameof(wellOperations), "The date difference between the operations is more than 3 months");
+                return this.ValidationBadRequest(validationResult);
 
             var result = await operationRepository.InsertRangeAsync(wellOperations, cancellationToken);
 
@@ -314,7 +314,7 @@ namespace AsbCloudWebApi.Controllers
             if (deleteBeforeInsert)
                 return operationRepository.Validate(wellOperations);
             else
-                return operationRepository.ValidateWithDbAsync(wellOperations, cancellationToken);
+                return await operationRepository.ValidateWithDbAsync(wellOperations, cancellationToken);
         }
 
         /// <summary>
@@ -342,9 +342,9 @@ namespace AsbCloudWebApi.Controllers
             value.LastUpdateDate = DateTimeOffset.UtcNow;
             value.IdUser = User.GetUserId();
 
-            var validationResult = operationRepository.ValidateWithDbAsync(new[] { value }, token);
+            var validationResult = await operationRepository.ValidateWithDbAsync(new[] { value }, token);
             if (validationResult.Any())
-                return this.ValidationBadRequest(nameof(value), "The date difference between the operations is more than 3 months");
+                return this.ValidationBadRequest(validationResult);
 
             var result = await operationRepository.UpdateAsync(value, token)
                 .ConfigureAwait(false);
diff --git a/AsbCloudWebApi/Extentions.cs b/AsbCloudWebApi/Extentions.cs
index ba87612f..c064d2de 100644
--- a/AsbCloudWebApi/Extentions.cs
+++ b/AsbCloudWebApi/Extentions.cs
@@ -3,6 +3,8 @@ using AsbCloudWebApi.Converters;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
 using System.Security.Claims;
 
 namespace Microsoft.AspNetCore.Mvc
@@ -53,6 +55,28 @@ namespace Microsoft.AspNetCore.Mvc
             return controller.BadRequest(problem);
         }
 
+        /// <summary>
+        /// <para>
+        /// Returns BadRequest with ValidationProblemDetails as body
+        /// </para>
+        /// <para>
+        /// Используйте этот метод только если валидацию нельзя сделать через 
+        /// атрибуты валидации или IValidatableObject модели.
+        /// </para>
+        /// </summary>
+        /// <param name="controller"></param>
+        /// <param name="paramName"></param>
+        /// <param name="error"></param>
+        /// <returns></returns>
+        public static BadRequestObjectResult ValidationBadRequest(this ControllerBase controller, IEnumerable<ValidationResult> validationResults)
+        {
+            var errors = validationResults
+                .SelectMany(e => e.MemberNames.Select(name=> new { name, e.ErrorMessage }))
+                .ToDictionary(e => e.name, e => new[] { e.ErrorMessage ?? string.Empty });
+            var problem = new ValidationProblemDetails(errors);
+            return controller.BadRequest(problem);
+        }
+
         public static MvcOptions UseDateOnlyTimeOnlyStringConverters(this MvcOptions options)
         {
             TypeDescriptor.AddAttributes(typeof(DateOnly), new TypeConverterAttribute(typeof(DateOnlyTypeConverter)));